content: /*
   * 支付宝开放平台API
   * 支付宝开放平台v3协议文档
   *
   * The version of the OpenAPI document: 2025-08-26
   * 
   *
   * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
   * https://openapi-generator.tech
   * Do not edit the class manually.
   */
  
  
  package com.alipay.v3;
  
  import okhttp3.MediaType;
  import okhttp3.ResponseBody;
  
  import java.io.IOException;
  
  import okio.Buffer;
  import okio.BufferedSource;
  import okio.ForwardingSource;
  import okio.Okio;
  import okio.Source;
  
  public class ProgressResponseBody extends ResponseBody {
  
      private final ResponseBody responseBody;
      private final ApiCallback callback;
      private BufferedSource bufferedSource;
  
      public ProgressResponseBody(ResponseBody responseBody, ApiCallback callback) {
          this.responseBody = responseBody;
          this.callback = callback;
      }
  
      @Override
      public MediaType contentType() {
          return responseBody.contentType();
      }
  
      @Override
      public long contentLength() {
          return responseBody.contentLength();
      }
  
      @Override
      public BufferedSource source() {
          if (bufferedSource == null) {
              bufferedSource = Okio.buffer(source(responseBody.source()));
          }
          return bufferedSource;
      }
  
      private Source source(Source source) {
          return new ForwardingSource(source) {
              long totalBytesRead = 0L;
  
              @Override
              public long read(Buffer sink, long byteCount) throws IOException {
                  long bytesRead = super.read(sink, byteCount);
                  // read() returns the number of bytes read, or -1 if this source is exhausted.
                  totalBytesRead += bytesRead != -1 ? bytesRead : 0;
                  callback.onDownloadProgress(totalBytesRead, responseBody.contentLength(), bytesRead == -1);
                  return bytesRead;
              }
          };
      }
  }
  